Lower tumbler.



G. B. KING & J. W. FELLMETH. LOWER TUMBLBR.

APPLICATION FILED SEPT. 10. 1910.

Patented Jan.v19, 1915.

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Horne/n CHARLES B. KING ANI) JACB W. FELLMETH, OF'MARION, Omo, ASSIGNORS T0 MARION STEAM SHOVEL COMPANY, 0F MARION, OHIO, A. CORPORATION 0F OHIO.

'LOWER TULNEBIER.'

yspecificati-m of Letters Patent.

Application filed September 10, 1910. Serial vN o. 581,418. p

To all whom it may concern Be it known that we, CHARLES B. KING nd` JACOB W. FELLMETH, citizens of the llnited States, residing at Marion, in the county of Marion and State of Ohio, have n invented certain newand useful Improvements in Lower Tumblers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to lower tumblers, such as are employed in connection with elevator dredges. .In dredges of this character the excavating is accomplished by means of an endless chain of buckets which pass about tumblers supported vat the inner and outer ends, respectively, of ya ladder or supporting frame. In the operation of the dredge this supporting frame is moved laterally during the digging operation and the mechanism, and more particularly the lower tumbler, its shaftand e bearings, are subjected to a very ,heavy strain Iand severe y wear. v

The object of the present invention is to `provide a lower tumbler of such a construction that it will strongly resist the strain imposedthereon, and those parts which are subjected to the most wear will be renewable; and further, to provide means for relieving the strain on the shaft and its bearings, this latter being preferably' accomplished by providing the shaft with endthrust bearings.

In the accompanying drawings Figure 1 is a sectional view, taken through the lower tumbler and a portion of the supporting frame, and showing one bearing inI elevation; and Fig. 2 is a sectional view, taken on the line a: ae of Fig; 1 and looking in the direction of the arrows.

In these drawings we have illustrated one embodiment of our invention andv have shown the same mounted in a supporting frame or ladder 1 comprising two-side mem bers,each of which is provided with a bearing 2. A shaft 3 is Journaled .in the two bearings and has its ends extending a short distance beyond the outer ends of therespective bearings. A tumbler 4 1s rigidly secured to the shaft 3between'the two members of the supporting frame. here shown this tumbler comprises a single casting, the body portion being preferably sixsided and having circumferential flanges arranged at the opposite ends thereof. The

body portion of the casting or tumbler is protected by wearing plates 5 of suitable material, such as manganese steel, and these wearing plates are secured to the tumbler in such a manner that they can be readily renewed when worn. f The more exposed parts of the flanges 6 are also protected by wearing plates, and in thepresent form of the device these plates comprise U-shaped clips,v 7, which extend over the tips or exposed parts of the flanges and are secured thereto by rivets 8, or in` any other suitable manner which will permit the same to be readily renewed when worn.` Those portions of the shafts 3 which extend beyondl the outer ends of the bearings 2 'have rigidly secured thereto bearing rings 9, which are here shown as disks or plates having recesses arranged centrally thereof and adapted to receive the respective ends of the shaft 3. These rings or disks are secured to the shaft by means of positive locking connections such as, for instance, pins 10. A

suitable bearing plate is rigidly connected with the end of eachvbearing and'is supported in alinement therewith at some distance from the end thereof. The relation of this plate to the end of the bearing is vsuch that the ring `9 will be confined between these two parts and anyv tendency of the shaft to move longitudinally in-either direction will be received either bythe end of the bearing or by the bearing plate. In the present instance the' outer end of thev bearing and the bearing ringare inclosed in a cap 11, which is rigidly secured to the end of the bearing by means of bolts, or any other suitable manner. The end wall 12 of this cap constitutes thebea-ring plate forI the bearing ring 9 and receives the outward thrust of the shaft. A wearing plate 13 isl It will ,be Iapparent that the construction I above described'y not only produces a tumbler ofa very rigid and durable construction, but furthery produces a ,tumbler m which the parts subjected to the greatest wear can be readily renewed, and which is so constructed and arranged that the tum# 'shaft journaled therein and extending beyond the end thereof, of a cap rigidly secured to the 'outer end of said bearing, and a bearing ring rigidly secured to said shaft within said cap and held against movement longitudinally to said bearing by the end of said bearing and the end wall of said cap.

2. rlhe combination, with a bearing, a shaft journaled therein and extending beyond the end thereof, and a cap rigidly secured. to the outer end of said bearing, of a disk' having a recess to receive the end of said shaft, rigidly secured thereto and conned between the end Wall of said cap and the outer end of said bearing.

3. rlfhe combination, with a bearing, a shaft journaled therein and extending beyond the end thereof, and a bearing plate supported beyond the outer end of said bearing, of a bearing ring rigidly secured to said shaft between said bearing plate and the end of said bearing, and wearing plates interposed directly between said bearing ring and the end of said bearing and said bearing plate respectively.

' 4. The combination, with a supporting frame, two bearings carried by said frame, spaced apart and each having a bearing surface at its outer end, and a shaftjournaled in said bearings and having its ends projecting beyond the outer ends of the respective bearings, and a rotary member mounted on said shaft between said bearings, of housings secured to the outer ends of the respective bearings and each having its end wall spaced away from the end'of the bearing to which it is secured and provided with a bearing surface, and bearing rings rigidly secured to the ends of said shaft within the respective housings and engaging both the bearing surface on the end of the bearing and the bearing surface on the end wall of said housing, whereby the lengthwise thrust of said shaft in either direction is opposed by bearings at both ends thereof.

5. rllhe combination, with a supporting frame, a bearing carried thereby, a shaft j ournaled'in said bearing,'said bearing having at its outer end a bearing surface, ya housing inclosing the outer end of said shaft, a water-tight connection between said housing and said bearing, and a packing ring at the inner end of said bearing to prevent the entrance of water or grit, the end wall of said housing being provided with an inner bearing surface, of a bearing ring rigidly secured to the end of said shaft within said housing and engaging both the bearing surface on the end wall of said housing and the bearing surface on the end of said bearing.

' ln testimonywhereof, we aiix our signatures in presence of two Witnesses.

. CHARLES B. KING.

JACOB W. FELLMETH. Witnesses: 1ML-. S'rom.,

D. L. Curr. 

